Check account hashes in snapshot (#7559)

* Check for incorrect hash value

* Finish up checking for incorrect hash value

* Fix comment a bit

Co-authored-by: sakridge <sakridge@gmail.com>

runtime/benches/accounts.rs

@@ -59,12 +59,12 @@ fn test_accounts_squash(bencher: &mut Bencher) {
 }
 
 #[bench]
-fn test_accounts_hash_internal_state(bencher: &mut Bencher) {
+fn test_accounts_hash_bank_hash(bencher: &mut Bencher) {
     let accounts = Accounts::new(vec![PathBuf::from("bench_accounts_hash_internal")]);
     let mut pubkeys: Vec<Pubkey> = vec![];
     create_test_accounts(&accounts, &mut pubkeys, 60000, 0);
     let ancestors = vec![(0, 0)].into_iter().collect();
     bencher.iter(|| {
-        accounts.verify_hash_internal_state(0, &ancestors);
+        accounts.verify_bank_hash(0, &ancestors);
     });
 }